Preheat oven to 350°F.

Brown the beef and pork together in a deep skillet over medium heat. When the meat is nearly cooked through, add the onion to the pan and continue cooking until translucent.

Add the garlic and cook for 1 minute.

Stir in the tomatoes, Italian seasoning, and tomato paste. Cook for 15 minutes over medium-low heat, stirring often.

While the sauce is cooking, bring a large pot of water to a boil and cook the gnocchi according to package instructions. Drain and add to the pot of sauce. Gently toss to coat.

Transfer to a 1 1/2 quart baking dish and top with the mozzarella slices and parsley.

Bake for 10 minutes.

Serve immediately.